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3 years ago

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If the random variable x is normally distributed with a mean equal to .45 and a standard deviation equal to .40, then P(x ≥ .75)

is:

1 answer:

stellarik [79]3 years ago

4 0

P(x ≥ 0.75) = P(z ≥ (0.75 - 0.45)/0.40) = P(z ≥ 0.30/0.40) = P(z ≥ 0.75) = 1 - P(z < 0.75) = 1 - 0.077337 = 0.22663

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Read 2 more answers

Find the apothem of an equilateral triangle with radius 8 cm.

Over [174]

In this question , the triangle is equilateral triangle , with radius equals to 8 cm and we have to find the length of apotherm, a .

Using sine ratio rule,

$sin C = \frac{ opposite}{hypotenuse}$

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So we will get

$sin 30 = \frac{a}{8}$

Multiplying both sides by 8

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